Uninitialized CameraController after closing and opening the application

[petodavid]

E/flutter (14891): [ERROR:flutter/lib/ui/ui_dart_state.cc(177)] Unhandled Exception: CameraException(Uninitialized CameraController, startImageStream was called on uninitialized CameraController.) E/flutter (14891): #0 CameraController.startImageStream (package:camera/camera.dart:438:7) E/flutter (14891): #1 CameraMlVisionState._start (package:flutter_camera_ml_vision/flutter_camera_ml_vision.dart:148:23) E/flutter (14891): #2 CameraMlVisionState.build. (package:flutter_camera_ml_vision/flutter_camera_ml_vision.dart:308:11) E/flutter (14891): #3 VisibilityDetectorLayer._fireCallback (package:flutter_widgets/src/visibility_detector/src/visibility_detector_layer.dart:268:24) E/flutter (14891): #4 VisibilityDetectorLayer._processCallbacks (package:flutter_widgets/src/visibility_detector/src/visibility_detector_layer.dart:239:13) E/flutter (14891): #5 _TaskEntry.run. (package:flutter/src/scheduler/binding.dart:80:34) E/flutter (14891): #6 Timeline.timeSync (dart:developer/timeline.dart:163:22) E/flutter (14891): #7 _TaskEntry.run (package:flutter/src/scheduler/binding.dart:77:16) E/flutter (14891): #8 SchedulerBinding.handleEventLoopCallback (package:flutter/src/scheduler/binding.dart:460:15) E/flutter (14891): #9 SchedulerBinding._runTasks (package:flutter/src/scheduler/binding.dart:438:9) E/flutter (14891): #10 _rootRun (dart:async/zone.dart:1182:47) E/flutter (14891): #11 _CustomZone.run (dart:async/zone.dart:1093:19) E/flutter (14891): #12 _CustomZone.runGuarded (dart:async/zone.dart:997:7) E/flutter (14891): #13 _CustomZone.bindCallbackGuarded. (dart:async/zone.dart:1037:23) E/flutter (14891): #14 _rootRun (dart:async/zone.dart:1190:13) E/flutter (14891): #15 _CustomZone.run (dart:async/zone.dart:1093:19) E/flutter (14891): #16 _CustomZone.bindCallback. (dart:async/zone.dart:1021:23) E/flutter (14891): #17 Timer._createTimer. (dart:async-patch/timer_patch.dart:18:15) E/flutter (14891): #18 _Timer._runTimers (dart:isolate-patch/timer_impl.dart:397:19) E/flutter (14891): #19 _Timer._handleMessage (dart:isolate-patch/timer_impl.dart:428:5) E/flutter (14891): #20 _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:168:12) E/flutter (14891):

class FaceVision extends StatefulWidget {
  @override
  _FaceVisionState createState() => _FaceVisionState();
}

class _FaceVisionState extends State<FaceVision> {
  List<Face> _faces = [];
  final _scanKey = GlobalKey<CameraMlVisionState>();
  CameraLensDirection cameraLensDirection = CameraLensDirection.front;
  FaceDetector detector = FirebaseVision.instance.faceDetector(
    FaceDetectorOptions(
      enableTracking: true,
      mode: FaceDetectorMode.fast,
    ),
  );

  @override
  Widget build(BuildContext context) {
    return CameraMlVision<List<Face>>(
      key: _scanKey,
      resolution: ResolutionPreset.max,
      cameraLensDirection: cameraLensDirection,
      detector: detector.processImage,
      overlayBuilder: (c) {
        return CustomPaint(
          painter: FaceDetectorPainter(
              _scanKey.currentState.cameraValue.previewSize.flipped, _faces,
              reflection: cameraLensDirection == CameraLensDirection.front),
        );
      },
      onResult: (faces) {
        if (faces == null || !mounted) {
          return;
        }
        setState(() {
          _faces = faces;
        });
        sl<RecognitionBloc>()..add(NewFaces(faces: _faces));
      },
      onDispose: () {
        detector.close();
      },
    );
  }

  @override
  void dispose() {
    super.dispose();
  }
}

[petodavid]

@Kleak

[nirbar89]

Hey @petodavid did you find a solution?